Alert archive / Oregon / Red Flag Warnings in 2021
Red Flag Warning 46, NWS Medford, OR
NWS Medford, OR issued this red flag warning at Sep 4, 2021, 2:30 PM PDT for Modoc County, California; Klamath County, Lake County, Oregon. It took effect at Sep 5, 2021, 2:00 PM PDT. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 4, 2021, 2:30 PM PDT (21:30 UTC)
- In effect from
- Sep 5, 2021, 2:00 PM PDT
- Expired
- Sep 5, 2021, 8:00 PM PDT
- In force
- 6 hr
- Issued by
- NWS Medford, OR
Counties Modoc County, CA, Klamath County, OR, Lake County, OR
The radar
The Medford radar (KMAX), 151 km from the middle of the area, began a volume at 21:34 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 12:00Z, 9.5 hours before the alert went out and 154 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2352 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
135 WWUS86 KMFR 042130 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 230 PM PDT Sat Sep 4 2021 CAZ285-ORZ624-051300- /O.NEW.KMFR.FW.W.0046.210905T2100Z-210906T0300Z/ /O.NEW.KMFR.FW.A.0033.210906T2100Z-210907T0300Z/ Modoc County Except for the Surprise Valley- Klamath Basin and the Fremont-Winema National Forest- 230 PM PDT Sat Sep 4 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 8 PM PDT SUNDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285 AND 624... ...FIRE WEATHER WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH MONDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285 AND 624... The National Weather Service in Medford has issued a Red Flag Warning...which is in effect from 2 PM to 8 PM PDT Sunday. A Fire Weather Watch has also been issued. This Fire Weather Watch is in effect from Monday afternoon through Monday evening. * Impacts: Strong, gusty wind with low relative humidity and critically dry vegetation will greatly increase the spread potential of any new and existing fires. * Affected area: In Northern CA Fire Zone....285. In South Central OR Fire Zone....624. * Wind: Southwest 10 to 15 mph with gusts up to 25 mph. * Humidity: 5-10 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... Avoid tossing burning cigarettes on the ground, parking hot vehicles on dry vegetation, and using equipment that can cause sparks. Follow all fire restrictions. Find links to restrictions at weather.gov/medford/wildfire. One less spark, one less wildfire. Gather your fire evacuation kit now. Collect essentials you don't want to lose and prioritize your checklist. Visit ready.gov/kit for more information. Familiarize yourself with your evacuation plan. Where will you go? How will you get there? Who will you call to let others know your are safe? Visit ready.gov/wildfires for more information. A Red Flag Warning does not mean there is a fire. It means that critical fire weather conditions are either occurring now or will shortly. These conditions promote rapid spread of fire which may become life threatening. Evacuate if ordered to, or if a fire threatens. A Fire Weather Watch means that critical fire weather conditions are possible during the valid watch time. These conditions could promote the rapid spread of wildfires which could become life- threatening. Check weather.gov/medford for forecast updates and a possible upgrade of the this watch to a Red Flag Warning. && $$ Visit us at www.weather.gov/Medford
3 follow-up statements
234
WWUS86 KMFR 051239
RFWMFR
URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
539 AM PDT Sun Sep 5 2021
CAZ285-ORZ624-060300-
/O.CON.KMFR.FW.W.0046.210905T2100Z-210906T0300Z/
/O.CON.KMFR.FW.A.0033.210906T2100Z-210907T0300Z/
Modoc County Except for the Surprise Valley-
Klamath Basin and the Fremont-Winema National Forest-
539 AM PDT Sun Sep 5 2021
...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO
8 PM PDT THIS EVENING FOR FOR GUSTY WIND WITH LOW RH IN PORTIONS OF FIRE
WEATHER ZONES 285 AND 624...
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM MONDAY AFTERNOON
THROUGH MONDAY EVENING FOR FOR GUSTY WIND WITH LOW RH IN PORTIONS OF FIRE
WEATHER ZONES 285 AND 624...
* Impacts: Gusty wind with single digit RH and critically dry vegetation
will greatly increase the spread potential of any new and
existing fires.
* Affected area:
- In Northern CA Fire Zone....Most of FWZ 285 today.
- In South Central OR Fire Zone....The Winter Rim to Warner
Mountains areas in FWZ 624.
* Wind: Southwest 10 to 15 mph with gusts up to 25 mph.
* Humidity: 5-10 percent.
* View the hazard area in detail at:
https://www.wrh.noaa.gov/mfr/HAZARD
$$
BTL
Visit us at www.weather.gov/Medford639 WWUS86 KMFR 052024 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 124 PM PDT Sun Sep 5 2021 ...Gusty Winds With Low Relative Humidity This Afternoon and Evening and Again Tuesday Afternoon and Evening... .A weak dry cold front will move into the area tonight, producing gusty winds along with preexisting low RHs over a large area east of the Cascades. Winds are expected to be weaker Monday afternoon, and conditions are now expected to be just shy of critical values. However, the arrival of an upper level trough Tuesday afternoon could produce another round of gusty winds, and with only very modest rises in humidity, critical fire weather is possible. CAZ285-ORZ624-061200- /O.CAN.KMFR.FW.A.0033.210906T2100Z-210907T0300Z/ /O.NEW.KMFR.FW.A.0034.210907T2000Z-210908T0300Z/ /O.CON.KMFR.FW.W.0046.210905T2100Z-210906T0300Z/ Modoc County Except for the Surprise Valley- Klamath Basin and the Fremont-Winema National Forest- 124 PM PDT Sun Sep 5 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285 AND 624... ...FIRE WEATHER WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING FOR GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285 AND 624... ...FIRE WEATHER WATCH IS CANCELLED FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285 AND 624... The National Weather Service in Medford has issued a Fire Weather Watch...which is in effect from Tuesday afternoon through Tuesday evening. The Fire Weather Watch for Monday has been cancelled. * Impacts: Gusty winds with low relative humidity and critically dry vegetation will greatly increase the spread potential of any new and existing fires. * Affected area: In Northern CA, much of Fire Weather Zone 285, including the Warner Mountains and portions of the Modoc National Forest, and the communities of Alturas, Canby, Adin, Tionesta, and Davis Creek. In South Central OR, southeastern Fire Zone 624, including the Warner Mountains, Winter Rim, portions of the Fremont Winema National Forest, and the communities of Lakeview and Valley Falls. * Wind: Southwest 10 to 15 mph with gusts up to 25 mph are expected today. Tuesday afternoon, south to southwest winds of 20 to 25 mph and gusts up to 30 mph are possible. * Humidity: 5-10 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... Avoid tossing burning cigarettes on the ground, parking hot vehicles on dry vegetation, and using equipment that can cause sparks. Follow all fire restrictions. Find links to restrictions at weather.gov/medford/wildfire. One less spark, one less wildfire. Gather your fire evacuation kit now. Collect essentials you don't want to lose and prioritize your checklist. Visit ready.gov/kit for more information. Familiarize yourself with your evacuation plan. Where will you go? How will you get there? Who will you call to let others know your are safe? Visit ready.gov/wildfires for more information. A Red Flag Warning does not mean there is a fire. It means that critical fire weather conditions are either occurring now or will shortly. These conditions promote rapid spread of fire which may become life threatening. Evacuate if ordered to, or if a fire threatens. && $$ Visit us at www.weather.gov/Medford
872 WWUS86 KMFR 060252 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 752 PM PDT Sun Sep 5 2021 CAZ285-ORZ624-061200- /O.EXP.KMFR.FW.W.0046.000000T0000Z-210906T0300Z/ /O.CON.KMFR.FW.A.0034.210907T2000Z-210908T0300Z/ Modoc County Except for the Surprise Valley- Klamath Basin and the Fremont-Winema National Forest- 752 PM PDT Sun Sep 5 2021 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING FOR GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285 AND 624... ...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285 AND 624... * Impacts: Strong, gusty wind with low relative humidity and critically dry vegetation will greatly increase the spread potential of any new and existing fires. * Affected area: In Northern CA, much of Fire Weather Zone 285, including the Warner Mountains and portions of the Modoc National Forest, and the communities of Alturas, Canby, Adin, Tionesta, and Davis Creek. In South Central OR, southeastern Fire Zone 624, including the Warner Mountains, Winter Rim, portions of the Fremont Winema National Forest, and the communities of Lakeview and Valley Falls. * Wind: Southwest 15 to 25 mph with gusts up to 30 mph. * Humidity: 5 to 10 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... A Fire Weather Watch means that critical fire weather conditions are possible during the valid watch time. These conditions could promote the rapid spread of wildfires which could become life- threatening. Check weather.gov/medford for forecast updates and a possible upgrade of the this watch to a Red Flag Warning. && $$ Visit us at www.weather.gov/Medford
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 2:30 PM PDT | Fire Weather Watch | MFR | Modoc | 23 hr |
| Sep 4, 1:41 PM PDT | Small Craft Advisory | MFR | 3 days |
Nearby
Red Flag Warnings in Oregon, 2021Red Flag Warnings in California, 2021Every red flag warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.